“Cost Down” Sounds Like English Until You Try to Say It

Walk into a Japanese factory meeting and you’ll hear コストダウン (kosuto daun) every five minutes. Engineers chase it, managers demand it, and finance departments celebrate it. The word is constructed from two perfectly real English pieces — cost and down — so it feels like it should be English.

It isn’t. No native speaker ever says “we achieved a cost down this quarter” or “let’s do a cost down.” The English phrases are cost reduction, cost cutting, or plain verbs like reduce costs and lower costs. コストダウン is a Japanese noun built from English parts — a wasei-eigo construction that sounds business-English but would get blank looks in a real English board meeting.

Born in the Factory, Raised in the Boardroom

コストダウン emerged from Japan’s postwar manufacturing boom, the era of kaizen, Toyota Production System, and relentless process refinement. Factories needed a snappy shorthand for “squeeze the unit cost down by a few yen” — and English-sounding business vocabulary carried a whiff of modernity and professionalism. コストダウン fit the mold: two English syllables, one Japanese meaning.

It slotted perfectly into Japanese grammar. You can say コストダウンする (to do cost-down = to cut costs), コストダウンを図る (to aim for cost reduction), or コストダウンに成功する (to succeed at cost-cutting). The word functions as a noun and, with する, as a verb. English never quite uses “cost down” this way.

A Whole Ecosystem of Wasei-Eigo Business Words

Japanese corporate speech is packed with English-looking words that English doesn’t actually use. All four of these are wasei-eigo:

• コストダウン (kosuto daun) → cost reduction
• コストパフォーマンス (kosuto pafōmansu) → cost-performance, value for money (often shortened to コスパ)
• スケールメリット (sukēru meritto) → economies of scale
• ベースアップ (bēsu appu) → base salary raise (often shortened to ベア)

Each one sounds like it could be from a Harvard Business Review article, but try any of them on a native English speaker and you’ll get a polite frown. They’re English ingredients assembled into Japanese business dishes.

Fun Fact

コスパ — the shortened form of コストパフォーマンス — has leaked out of business jargon into everyday youth slang. Japanese Gen Z will rate a ramen shop, a date, or a college degree by its コスパ (“value for the effort”). Meanwhile, the older sibling コストダウン stays firmly stuck in the factory and the boardroom, never invited to the casual party.